Three man mechanics

[stewcall]

Attempting to learn the basics on three man mechanics (will probably be next year before I will need to know)

Ball goes OOB on the side line nearest the Center A1 front Court
1 below the free throw line extended A keeps the ball
Does the L throw the ball in the the old center become the trail?

2 above the free throw line A keeps the ball
Does the lead flex and the old Center become the trail and makes the throw in?

3 B gets the ball
Is there a flex where the old L makes the throw in and the old Center becomes the new Lead

thanks in advance for these simple questions. Our Association has made a committment to three man next year for most if not all HS games- just trying to get a jump on the matter
Stew in VA CVBOA